代数问题~~~~~~~~~~~~~~~~~
|y-2x|+(x+y-3)^2=0,求y^-2的值
参考答案:解:|y-2x|+(x+y-3)^2=0
因为|y-2x|大于等于零,(x+y-3)^2大于等于零,两者之和等于零。则|y-2x|=0,(x+y-3)^2=0
即y-2x=0,x+y-3=0
解得x=1,y=2
|y-2x|+(x+y-3)^2=0,求y^-2的值
参考答案:解:|y-2x|+(x+y-3)^2=0
因为|y-2x|大于等于零,(x+y-3)^2大于等于零,两者之和等于零。则|y-2x|=0,(x+y-3)^2=0
即y-2x=0,x+y-3=0
解得x=1,y=2